1 //===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/MC/MCStreamer.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/Twine.h"
13 #include "llvm/MC/MCAsmInfo.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCExpr.h"
16 #include "llvm/MC/MCObjectWriter.h"
17 #include "llvm/MC/MCSymbol.h"
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/Support/LEB128.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include <cstdlib>
22 using namespace llvm;
23
MCStreamer(StreamerKind Kind,MCContext & Ctx)24 MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx)
25 : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
26 CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) {
27 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
28 }
29
~MCStreamer()30 MCStreamer::~MCStreamer() {
31 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
32 delete W64UnwindInfos[i];
33 }
34
reset()35 void MCStreamer::reset() {
36 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
37 delete W64UnwindInfos[i];
38 W64UnwindInfos.clear();
39 EmitEHFrame = true;
40 EmitDebugFrame = false;
41 CurrentW64UnwindInfo = 0;
42 LastSymbol = 0;
43 SectionStack.clear();
44 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
45 }
46
BuildSymbolDiff(MCContext & Context,const MCSymbol * A,const MCSymbol * B)47 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
48 const MCSymbol *A,
49 const MCSymbol *B) {
50 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
51 const MCExpr *ARef =
52 MCSymbolRefExpr::Create(A, Variant, Context);
53 const MCExpr *BRef =
54 MCSymbolRefExpr::Create(B, Variant, Context);
55 const MCExpr *AddrDelta =
56 MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
57 return AddrDelta;
58 }
59
ForceExpAbs(const MCExpr * Expr)60 const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
61 if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
62 isa<MCSymbolRefExpr>(Expr))
63 return Expr;
64
65 MCSymbol *ABS = Context.CreateTempSymbol();
66 EmitAssignment(ABS, Expr);
67 return MCSymbolRefExpr::Create(ABS, Context);
68 }
69
GetCommentOS()70 raw_ostream &MCStreamer::GetCommentOS() {
71 // By default, discard comments.
72 return nulls();
73 }
74
EmitDwarfSetLineAddr(int64_t LineDelta,const MCSymbol * Label,int PointerSize)75 void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
76 const MCSymbol *Label, int PointerSize) {
77 // emit the sequence to set the address
78 EmitIntValue(dwarf::DW_LNS_extended_op, 1);
79 EmitULEB128IntValue(PointerSize + 1);
80 EmitIntValue(dwarf::DW_LNE_set_address, 1);
81 EmitSymbolValue(Label, PointerSize);
82
83 // emit the sequence for the LineDelta (from 1) and a zero address delta.
84 MCDwarfLineAddr::Emit(this, LineDelta, 0);
85 }
86
87 /// EmitIntValue - Special case of EmitValue that avoids the client having to
88 /// pass in a MCExpr for constant integers.
EmitIntValue(uint64_t Value,unsigned Size)89 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
90 assert(Size <= 8 && "Invalid size");
91 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
92 "Invalid size");
93 char buf[8];
94 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
95 for (unsigned i = 0; i != Size; ++i) {
96 unsigned index = isLittleEndian ? i : (Size - i - 1);
97 buf[i] = uint8_t(Value >> (index * 8));
98 }
99 EmitBytes(StringRef(buf, Size));
100 }
101
102 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
103 /// client having to pass in a MCExpr for constant integers.
EmitULEB128IntValue(uint64_t Value,unsigned Padding)104 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
105 SmallString<128> Tmp;
106 raw_svector_ostream OSE(Tmp);
107 encodeULEB128(Value, OSE, Padding);
108 EmitBytes(OSE.str());
109 }
110
111 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
112 /// client having to pass in a MCExpr for constant integers.
EmitSLEB128IntValue(int64_t Value)113 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
114 SmallString<128> Tmp;
115 raw_svector_ostream OSE(Tmp);
116 encodeSLEB128(Value, OSE);
117 EmitBytes(OSE.str());
118 }
119
EmitAbsValue(const MCExpr * Value,unsigned Size)120 void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
121 const MCExpr *ABS = ForceExpAbs(Value);
122 EmitValue(ABS, Size);
123 }
124
125
EmitValue(const MCExpr * Value,unsigned Size)126 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
127 EmitValueImpl(Value, Size);
128 }
129
EmitSymbolValue(const MCSymbol * Sym,unsigned Size)130 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
131 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
132 }
133
EmitGPRel64Value(const MCExpr * Value)134 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
135 report_fatal_error("unsupported directive in streamer");
136 }
137
EmitGPRel32Value(const MCExpr * Value)138 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
139 report_fatal_error("unsupported directive in streamer");
140 }
141
142 /// EmitFill - Emit NumBytes bytes worth of the value specified by
143 /// FillValue. This implements directives such as '.space'.
EmitFill(uint64_t NumBytes,uint8_t FillValue)144 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
145 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
146 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
147 EmitValue(E, 1);
148 }
149
150 /// The implementation in this class just redirects to EmitFill.
EmitZeros(uint64_t NumBytes)151 void MCStreamer::EmitZeros(uint64_t NumBytes) {
152 EmitFill(NumBytes, 0);
153 }
154
EmitDwarfFileDirective(unsigned FileNo,StringRef Directory,StringRef Filename,unsigned CUID)155 bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
156 StringRef Directory,
157 StringRef Filename, unsigned CUID) {
158 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0;
159 }
160
EmitDwarfLocDirective(unsigned FileNo,unsigned Line,unsigned Column,unsigned Flags,unsigned Isa,unsigned Discriminator,StringRef FileName)161 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
162 unsigned Column, unsigned Flags,
163 unsigned Isa,
164 unsigned Discriminator,
165 StringRef FileName) {
166 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
167 Discriminator);
168 }
169
getCurrentFrameInfo()170 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
171 if (FrameInfos.empty())
172 return 0;
173 return &FrameInfos.back();
174 }
175
EnsureValidFrame()176 void MCStreamer::EnsureValidFrame() {
177 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
178 if (!CurFrame || CurFrame->End)
179 report_fatal_error("No open frame");
180 }
181
EmitEHSymAttributes(const MCSymbol * Symbol,MCSymbol * EHSymbol)182 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
183 MCSymbol *EHSymbol) {
184 }
185
EmitLabel(MCSymbol * Symbol)186 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
187 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
188 assert(getCurrentSection().first && "Cannot emit before setting section!");
189 Symbol->setSection(*getCurrentSection().first);
190 LastSymbol = Symbol;
191 }
192
EmitDebugLabel(MCSymbol * Symbol)193 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
194 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
195 assert(getCurrentSection().first && "Cannot emit before setting section!");
196 Symbol->setSection(*getCurrentSection().first);
197 LastSymbol = Symbol;
198 }
199
EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding)200 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
201 EnsureValidFrame();
202 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
203 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
204 }
205
EmitCFISections(bool EH,bool Debug)206 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
207 assert(EH || Debug);
208 EmitEHFrame = EH;
209 EmitDebugFrame = Debug;
210 }
211
EmitCFIStartProc()212 void MCStreamer::EmitCFIStartProc() {
213 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
214 if (CurFrame && !CurFrame->End)
215 report_fatal_error("Starting a frame before finishing the previous one!");
216
217 MCDwarfFrameInfo Frame;
218 EmitCFIStartProcImpl(Frame);
219
220 FrameInfos.push_back(Frame);
221 }
222
EmitCFIStartProcImpl(MCDwarfFrameInfo & Frame)223 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
224 }
225
RecordProcStart(MCDwarfFrameInfo & Frame)226 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
227 Frame.Function = LastSymbol;
228 // If the function is externally visible, we need to create a local
229 // symbol to avoid relocations.
230 StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix();
231 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
232 Frame.Begin = LastSymbol;
233 } else {
234 Frame.Begin = getContext().CreateTempSymbol();
235 EmitLabel(Frame.Begin);
236 }
237 }
238
EmitCFIEndProc()239 void MCStreamer::EmitCFIEndProc() {
240 EnsureValidFrame();
241 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
242 EmitCFIEndProcImpl(*CurFrame);
243 }
244
EmitCFIEndProcImpl(MCDwarfFrameInfo & Frame)245 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
246 }
247
RecordProcEnd(MCDwarfFrameInfo & Frame)248 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
249 Frame.End = getContext().CreateTempSymbol();
250 EmitLabel(Frame.End);
251 }
252
EmitCFICommon()253 MCSymbol *MCStreamer::EmitCFICommon() {
254 EnsureValidFrame();
255 MCSymbol *Label = getContext().CreateTempSymbol();
256 EmitLabel(Label);
257 return Label;
258 }
259
EmitCFIDefCfa(int64_t Register,int64_t Offset)260 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
261 MCSymbol *Label = EmitCFICommon();
262 MCCFIInstruction Instruction =
263 MCCFIInstruction::createDefCfa(Label, Register, Offset);
264 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
265 CurFrame->Instructions.push_back(Instruction);
266 }
267
EmitCFIDefCfaOffset(int64_t Offset)268 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
269 MCSymbol *Label = EmitCFICommon();
270 MCCFIInstruction Instruction =
271 MCCFIInstruction::createDefCfaOffset(Label, Offset);
272 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
273 CurFrame->Instructions.push_back(Instruction);
274 }
275
EmitCFIAdjustCfaOffset(int64_t Adjustment)276 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
277 MCSymbol *Label = EmitCFICommon();
278 MCCFIInstruction Instruction =
279 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
280 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
281 CurFrame->Instructions.push_back(Instruction);
282 }
283
EmitCFIDefCfaRegister(int64_t Register)284 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
285 MCSymbol *Label = EmitCFICommon();
286 MCCFIInstruction Instruction =
287 MCCFIInstruction::createDefCfaRegister(Label, Register);
288 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
289 CurFrame->Instructions.push_back(Instruction);
290 }
291
EmitCFIOffset(int64_t Register,int64_t Offset)292 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
293 MCSymbol *Label = EmitCFICommon();
294 MCCFIInstruction Instruction =
295 MCCFIInstruction::createOffset(Label, Register, Offset);
296 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
297 CurFrame->Instructions.push_back(Instruction);
298 }
299
EmitCFIRelOffset(int64_t Register,int64_t Offset)300 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
301 MCSymbol *Label = EmitCFICommon();
302 MCCFIInstruction Instruction =
303 MCCFIInstruction::createRelOffset(Label, Register, Offset);
304 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
305 CurFrame->Instructions.push_back(Instruction);
306 }
307
EmitCFIPersonality(const MCSymbol * Sym,unsigned Encoding)308 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
309 unsigned Encoding) {
310 EnsureValidFrame();
311 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
312 CurFrame->Personality = Sym;
313 CurFrame->PersonalityEncoding = Encoding;
314 }
315
EmitCFILsda(const MCSymbol * Sym,unsigned Encoding)316 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
317 EnsureValidFrame();
318 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
319 CurFrame->Lsda = Sym;
320 CurFrame->LsdaEncoding = Encoding;
321 }
322
EmitCFIRememberState()323 void MCStreamer::EmitCFIRememberState() {
324 MCSymbol *Label = EmitCFICommon();
325 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
326 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
327 CurFrame->Instructions.push_back(Instruction);
328 }
329
EmitCFIRestoreState()330 void MCStreamer::EmitCFIRestoreState() {
331 // FIXME: Error if there is no matching cfi_remember_state.
332 MCSymbol *Label = EmitCFICommon();
333 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
334 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
335 CurFrame->Instructions.push_back(Instruction);
336 }
337
EmitCFISameValue(int64_t Register)338 void MCStreamer::EmitCFISameValue(int64_t Register) {
339 MCSymbol *Label = EmitCFICommon();
340 MCCFIInstruction Instruction =
341 MCCFIInstruction::createSameValue(Label, Register);
342 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
343 CurFrame->Instructions.push_back(Instruction);
344 }
345
EmitCFIRestore(int64_t Register)346 void MCStreamer::EmitCFIRestore(int64_t Register) {
347 MCSymbol *Label = EmitCFICommon();
348 MCCFIInstruction Instruction =
349 MCCFIInstruction::createRestore(Label, Register);
350 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
351 CurFrame->Instructions.push_back(Instruction);
352 }
353
EmitCFIEscape(StringRef Values)354 void MCStreamer::EmitCFIEscape(StringRef Values) {
355 MCSymbol *Label = EmitCFICommon();
356 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
357 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
358 CurFrame->Instructions.push_back(Instruction);
359 }
360
EmitCFISignalFrame()361 void MCStreamer::EmitCFISignalFrame() {
362 EnsureValidFrame();
363 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
364 CurFrame->IsSignalFrame = true;
365 }
366
EmitCFIUndefined(int64_t Register)367 void MCStreamer::EmitCFIUndefined(int64_t Register) {
368 MCSymbol *Label = EmitCFICommon();
369 MCCFIInstruction Instruction =
370 MCCFIInstruction::createUndefined(Label, Register);
371 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
372 CurFrame->Instructions.push_back(Instruction);
373 }
374
EmitCFIRegister(int64_t Register1,int64_t Register2)375 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
376 MCSymbol *Label = EmitCFICommon();
377 MCCFIInstruction Instruction =
378 MCCFIInstruction::createRegister(Label, Register1, Register2);
379 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
380 CurFrame->Instructions.push_back(Instruction);
381 }
382
setCurrentW64UnwindInfo(MCWin64EHUnwindInfo * Frame)383 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
384 W64UnwindInfos.push_back(Frame);
385 CurrentW64UnwindInfo = W64UnwindInfos.back();
386 }
387
EnsureValidW64UnwindInfo()388 void MCStreamer::EnsureValidW64UnwindInfo() {
389 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
390 if (!CurFrame || CurFrame->End)
391 report_fatal_error("No open Win64 EH frame function!");
392 }
393
EmitWin64EHStartProc(const MCSymbol * Symbol)394 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
395 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
396 if (CurFrame && !CurFrame->End)
397 report_fatal_error("Starting a function before ending the previous one!");
398 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
399 Frame->Begin = getContext().CreateTempSymbol();
400 Frame->Function = Symbol;
401 EmitLabel(Frame->Begin);
402 setCurrentW64UnwindInfo(Frame);
403 }
404
EmitWin64EHEndProc()405 void MCStreamer::EmitWin64EHEndProc() {
406 EnsureValidW64UnwindInfo();
407 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
408 if (CurFrame->ChainedParent)
409 report_fatal_error("Not all chained regions terminated!");
410 CurFrame->End = getContext().CreateTempSymbol();
411 EmitLabel(CurFrame->End);
412 }
413
EmitWin64EHStartChained()414 void MCStreamer::EmitWin64EHStartChained() {
415 EnsureValidW64UnwindInfo();
416 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
417 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
418 Frame->Begin = getContext().CreateTempSymbol();
419 Frame->Function = CurFrame->Function;
420 Frame->ChainedParent = CurFrame;
421 EmitLabel(Frame->Begin);
422 setCurrentW64UnwindInfo(Frame);
423 }
424
EmitWin64EHEndChained()425 void MCStreamer::EmitWin64EHEndChained() {
426 EnsureValidW64UnwindInfo();
427 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
428 if (!CurFrame->ChainedParent)
429 report_fatal_error("End of a chained region outside a chained region!");
430 CurFrame->End = getContext().CreateTempSymbol();
431 EmitLabel(CurFrame->End);
432 CurrentW64UnwindInfo = CurFrame->ChainedParent;
433 }
434
EmitWin64EHHandler(const MCSymbol * Sym,bool Unwind,bool Except)435 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
436 bool Except) {
437 EnsureValidW64UnwindInfo();
438 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
439 if (CurFrame->ChainedParent)
440 report_fatal_error("Chained unwind areas can't have handlers!");
441 CurFrame->ExceptionHandler = Sym;
442 if (!Except && !Unwind)
443 report_fatal_error("Don't know what kind of handler this is!");
444 if (Unwind)
445 CurFrame->HandlesUnwind = true;
446 if (Except)
447 CurFrame->HandlesExceptions = true;
448 }
449
EmitWin64EHHandlerData()450 void MCStreamer::EmitWin64EHHandlerData() {
451 EnsureValidW64UnwindInfo();
452 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
453 if (CurFrame->ChainedParent)
454 report_fatal_error("Chained unwind areas can't have handlers!");
455 }
456
EmitWin64EHPushReg(unsigned Register)457 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
458 EnsureValidW64UnwindInfo();
459 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
460 MCSymbol *Label = getContext().CreateTempSymbol();
461 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
462 EmitLabel(Label);
463 CurFrame->Instructions.push_back(Inst);
464 }
465
EmitWin64EHSetFrame(unsigned Register,unsigned Offset)466 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
467 EnsureValidW64UnwindInfo();
468 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
469 if (CurFrame->LastFrameInst >= 0)
470 report_fatal_error("Frame register and offset already specified!");
471 if (Offset & 0x0F)
472 report_fatal_error("Misaligned frame pointer offset!");
473 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, 0, Register, Offset);
474 CurFrame->LastFrameInst = CurFrame->Instructions.size();
475 CurFrame->Instructions.push_back(Inst);
476 }
477
EmitWin64EHAllocStack(unsigned Size)478 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
479 EnsureValidW64UnwindInfo();
480 if (Size & 7)
481 report_fatal_error("Misaligned stack allocation!");
482 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
483 MCSymbol *Label = getContext().CreateTempSymbol();
484 MCWin64EHInstruction Inst(Label, Size);
485 EmitLabel(Label);
486 CurFrame->Instructions.push_back(Inst);
487 }
488
EmitWin64EHSaveReg(unsigned Register,unsigned Offset)489 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
490 EnsureValidW64UnwindInfo();
491 if (Offset & 7)
492 report_fatal_error("Misaligned saved register offset!");
493 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
494 MCSymbol *Label = getContext().CreateTempSymbol();
495 MCWin64EHInstruction Inst(
496 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
497 Label, Register, Offset);
498 EmitLabel(Label);
499 CurFrame->Instructions.push_back(Inst);
500 }
501
EmitWin64EHSaveXMM(unsigned Register,unsigned Offset)502 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
503 EnsureValidW64UnwindInfo();
504 if (Offset & 0x0F)
505 report_fatal_error("Misaligned saved vector register offset!");
506 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
507 MCSymbol *Label = getContext().CreateTempSymbol();
508 MCWin64EHInstruction Inst(
509 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
510 Label, Register, Offset);
511 EmitLabel(Label);
512 CurFrame->Instructions.push_back(Inst);
513 }
514
EmitWin64EHPushFrame(bool Code)515 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
516 EnsureValidW64UnwindInfo();
517 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
518 if (CurFrame->Instructions.size() > 0)
519 report_fatal_error("If present, PushMachFrame must be the first UOP");
520 MCSymbol *Label = getContext().CreateTempSymbol();
521 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
522 EmitLabel(Label);
523 CurFrame->Instructions.push_back(Inst);
524 }
525
EmitWin64EHEndProlog()526 void MCStreamer::EmitWin64EHEndProlog() {
527 EnsureValidW64UnwindInfo();
528 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
529 CurFrame->PrologEnd = getContext().CreateTempSymbol();
530 EmitLabel(CurFrame->PrologEnd);
531 }
532
EmitCOFFSecRel32(MCSymbol const * Symbol)533 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
534 llvm_unreachable("This file format doesn't support this directive");
535 }
536
EmitFnStart()537 void MCStreamer::EmitFnStart() {
538 errs() << "Not implemented yet\n";
539 abort();
540 }
541
EmitFnEnd()542 void MCStreamer::EmitFnEnd() {
543 errs() << "Not implemented yet\n";
544 abort();
545 }
546
EmitCantUnwind()547 void MCStreamer::EmitCantUnwind() {
548 errs() << "Not implemented yet\n";
549 abort();
550 }
551
EmitHandlerData()552 void MCStreamer::EmitHandlerData() {
553 errs() << "Not implemented yet\n";
554 abort();
555 }
556
EmitPersonality(const MCSymbol * Personality)557 void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
558 errs() << "Not implemented yet\n";
559 abort();
560 }
561
EmitSetFP(unsigned FpReg,unsigned SpReg,int64_t Offset)562 void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
563 errs() << "Not implemented yet\n";
564 abort();
565 }
566
EmitPad(int64_t Offset)567 void MCStreamer::EmitPad(int64_t Offset) {
568 errs() << "Not implemented yet\n";
569 abort();
570 }
571
EmitRegSave(const SmallVectorImpl<unsigned> & RegList,bool)572 void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
573 errs() << "Not implemented yet\n";
574 abort();
575 }
576
EmitTCEntry(const MCSymbol & S)577 void MCStreamer::EmitTCEntry(const MCSymbol &S) {
578 llvm_unreachable("Unsupported method");
579 }
580
581 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
582 /// the specified string in the output .s file. This capability is
583 /// indicated by the hasRawTextSupport() predicate.
EmitRawText(StringRef String)584 void MCStreamer::EmitRawText(StringRef String) {
585 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
586 " something must not be fully mc'ized\n";
587 abort();
588 }
589
EmitRawText(const Twine & T)590 void MCStreamer::EmitRawText(const Twine &T) {
591 SmallString<128> Str;
592 T.toVector(Str);
593 EmitRawText(Str.str());
594 }
595
EmitFrames(bool usingCFI)596 void MCStreamer::EmitFrames(bool usingCFI) {
597 if (!getNumFrameInfos())
598 return;
599
600 if (EmitEHFrame)
601 MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
602
603 if (EmitDebugFrame)
604 MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
605 }
606
EmitW64Tables()607 void MCStreamer::EmitW64Tables() {
608 if (!getNumW64UnwindInfos())
609 return;
610
611 MCWin64EHUnwindEmitter::Emit(*this);
612 }
613
Finish()614 void MCStreamer::Finish() {
615 if (!FrameInfos.empty() && !FrameInfos.back().End)
616 report_fatal_error("Unfinished frame!");
617
618 FinishImpl();
619 }
620
getOrCreateSymbolData(MCSymbol * Symbol)621 MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
622 report_fatal_error("Not supported!");
623 return *(static_cast<MCSymbolData*>(0));
624 }
625